colinhacks

import * as z from "zod";

export const a = z.object({
  a: z.string(),
  b: z.string(),
  c: z.string(),
});

export const b = a.omit({
  a: true,

colinhacks

import { randomString } from "./benchUtil.js";
import { metabench } from "./metabench.js";

export function lazyWithInternalProp<T>(getter: () => T) {
  return {
    __value: undefined as T,
    get value() {
      if (this.__value) return this.__value;
      const value = getter();
      this.__value = value;

colinhacks

function lazy<T>(getter: () => T): { value: T } {
  return {
    get value() {
      const value = getter();
      Object.defineProperty(this, "value", { value });
      return value;
    },
  };
}

colinhacks

import * as z from "zod";

const mySchema = z.string();

// there is a global schema registry
z.globalRegistry; // => ZodRegistry<unknown, z.ZodType>

// add schema to registry w/ associated metadata
z.globalRegistry.add(mySchema, { name: "foo", description: "bar" });
// equivalent convenience method (returns mySchema)

colinhacks

alias howto="gh copilot suggest -t shell"

colinhacks

[
  {
    "key": "cmd+;",
    "command": "editor.action.goToDeclaration"
  },
  {
    "key": "shift+cmd+;",
    "command": "workbench.action.navigateBack",
    "when": "canNavigateBack"
  }

colinhacks

gh repo clone https://github.com/colinhacks/live-typescript-monorepo
cd live-typescript-monorepo
cd project-references
pnpm i
code .
# open packages/pkg-b/index.ts 
# see Cannot find module 'pkg-a' or its corresponding type declarations
pnpm build # runs `tsc -b`
# restart ts server, "Cannot find module" goes away
pnpm clean # deletes node_modules in all packages

colinhacks

Adapted from this recommendation by @jandockx

Cyclical objects

Despite supporting recursive schemas, passing cyclical data into Zod will cause an infinite loop in some cases.

You can protect against cyclical objects starting an infinite loop (at a performance cost) with the following approach (using the above jsonSchema as an example):

colinhacks

gh repo clone https://github.com/t3-oss/t3-env t3env
cd t3env
git checkout @t3-oss/[email protected]
pnpm i
pnpm update zod --latest --recursive
pnpm run build

colinhacks

import Benchmark from "benchmark";

const datetimeValidationSuite = new Benchmark.Suite("datetime");

const DATA = "2020-01-01";
const MONTHS_31 = new Set([1, 3, 5, 7, 8, 10, 12]);
const MONTHS_30 = new Set([4, 6, 9, 11]);

const simpleDatetimeRegex = /^(\d{4})-(\d{2})-(\d{2})$/;
const datetimeRegexNoLeapYearValidation =